\begin{abstract}
    This is a very long sentence that
    should be wrapped at some point,
    which is the case but is is is is
    line width is not respected because
    of the indentation.
    \begin{another}
        Another is a very long sentence
        that should be wrapped at some
        point, which is the case but is
        is is is line width is not
        respected because of the
        indentation.
    \end{another}
\end{abstract}
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